Can-forming mandrel



J. S. WENTWORTH. CAN FORMING MANDBEL.-

APPLICATION ELLED MAR. H, 1918.

Patented J H1168, 1920.

2 SHEETS-SHEET I.

Not nu:

I S. WENTWORTH. CAN FORMING MANDREL. APPLICATION man MAR. 11, I918.

Patented June 8, 1920.

2 SHEETS SHEET 2- 4H a F Fay. J

I 511400 ntoz f% wings, the outer surfaces of the wings JESSE S. WENTWORTI-I,

or nonwoon, OHIO.

CAN-FORMING- MANDREL.

Application filed March 11,

To all whom it may concern:

Be it known that I, JESSE WENTWoIrrH, a citizen of the United States of America, and resident of Norwood, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Can-. Forming Mandrels, of which the following is a specification.

An object of my invention is to produce a mandrel upon which cans of paper or other fibrous material may be constructed, the walls of the mandrel being adapted to be expanded previous to the construction of the can and to be contracted to remove the completed can.

A further object is to produce a mandrel adapted to be expanded and contracted in the can forming and removing operatlons, to be subjected to vacuum pressure during the can forming operation, and to be subjected to positive pressure during the can removing operation.

These and other objects are attained-in the mandrel described in the following specification and illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal sectional view of a mandrel embodying my invention.

Fig. 2 is an end elevation ofmy improved mandrel. I I

Fig. 3 is a transverse sectional view taken on the line 33 of Fig. portions of the spring being broken away.

Fig. 4 is a transverse elevation upon the line 4-4 of Fig. 1.

Fig. 5 is an elevation of my improved mandrel and a vertical sectional view of the mechanism adapted to operate it.

Fig. 6 is a sectional .view of a canwhich has been constructed upon and removed from the mandrel shown in Fig. 1.

My improved mandrel consists of a core comprising a shaft 7 and a sleeve 8 mounted upon the shaft, a hinge block 9 secured to the sleeve by means of screws 10 and 11, and wings l2 and 13 which are operated to expand or contract the mandrel, by means of a wedge 14 which is operated from a reciprocall mounted key 15 located in the shaft. leeve 8 is secured to shaft 7 by means of screws 10 and 11 which pass through block 9 as well as the sleeve and into the shaft. At each side the block is rovided with lugs 16' which cooperate with ugs 17 on wings 12 and 13 for pivotinfg the f Specification of Letters Patent.

1918. Serial No. 221,611.

" Patented J une S, 1920.

ing a-true circle with the curvature of block circle of the sleeve 8 when in contracted positions as shown in dotted lines in Fig. 3. The ends of wings 12 and 13 are beveled to conform to the angle of wedge 14 so as to cause expanding and contracting movement of the wings when the wedge is moved radially. .A spring 18 is provided for retaining the wings 12 and 13 in engagement with the wedge when in their expanded position and in engagement with the sleeve when in their contracted position. "This spring is attached to webs 19 and 20 formed upon the interior of the wings, and is stretched across aspace 21which is provided by removing a portion of sleeve 8 between its ends 22 and 23 as shown in Figs. 1 and 3. Wedge 14 is provided with a pair of guides 24 and 25 which guide it when being moved radially. A pair of lugs 26 and 27 are located between the guides 24 and 25 for attachment to links 28 and 29 of pairs of toggle links, thecooperating links 30 and 31 of which are connected to pairs of lugs 32 and 33 formed on sleeve 8 as shown in F ig.

3. At their connected ends the links are connected to links 34 and 35, the opposite ends of which are connected to lugs 36 and 37 extending from the key 15. Thus when the key 15 1s reciprocated in its mounting way 38, the wedge is caused to move the wings to mandrel-expanding position or to position to permit the wings to contract the mandrel under the influence of spring 18.

Upon the end of the mandrel I mount a plate 39 which is of a diameter equal to that of the mandrel when contracted. For the purpose of assisting in the construction of cans upon my improved mandrel, as well as intheir removal therefrom, I have provided.

an air passage 40 passing through the shaft and co'mmumcating with branch passages 41 extending through end plate 39 as well as a branch passage 42 which connectswith a series of passages 43 extending through block 9.

In order to illustrate the operation of my improved mandrel, I have illustrated in Fig. 5 a form of mechanism adapted to operate the mandrel. A spider 44 is mounted upon a shaft 45. and isadapted to mount shaft 7 of the mandrelrotatively. A pinion 46 is secured to shaft 7 and is driven by a gear 47 from shaft 45. To effect exlarge and contracting movement of the panding mandrel 7 connected with have provided a yoke 49 from a lever 50 which carries key of the .mandrel and which is operated a roller '51 at its end. Roller 51 operates upon a cam 52 14 to effect collapsing movement of the man-.

drel. A spring 53 is provided to return the lever and consequently the key and wedge wedge reciprocally to mandrel-expanding position, or vice versa.

In the operation of my improved mandrel during the making of a can thereon, the mandrel is expanded. The bottom of the can is now placed over end plate 39 and the strip of paper from which the can is constructed is now placed in contacts with the openings 43 and air suction is created through passages 40, 41, 42 and 43. The mandrel rotation being continuous, the paper is wound around the bottom and mandrel until the required thickness of can shell 54 is produced. The projecting edges of the bottom and body are then spun over one another to produce the beaded bottom shown in Fig. 6. After the can has thus been constructed, the mandrel is collapsed to free the can, and by any suitable means, as by air blown through the passages 40, 41, 42 and 43, the can is discharged from the mandrel.

Having thus described my invention, what Iclaim isz 1. A can-forming mandrel consisting of a core, wings pivotally mounted on the core, a key reciprocally mounted in the core, a mounted for movement between the wings, and a toggle joint between the key and wedge, wing-spreading movement of the wedge when the key is operated.

2. A can-forming mandrel consisting of a core, wings plvotally mountedon the core,

I have shown a grooved collar 48' adapted to effect 7 a key reciprocally mounted in the core, a wedge reciprocally mounted for movement between the wings, a toggle joint operatively connected with the key and wedge, adapted to effect wing-spreading movement of'the 50 to thecore, said parts of the core. having a1r passages in them adapted to form a part of a vacuum system, wings pivoted to the hinge block, and means expand and contract the mandrel.

4. A can-forming mandrel comprising a core consisting of a series of relatively stationary parts, and a series of relatively movable parts connected with the core, the I outer faces of certain of said stationary parts and of said movable parts forming the surfaces of the mandrel, said stationary parts having air passages therein communicatlng with the outer surfaces of said parts.

5. A can-forming mandrel consisting of a core havmg a portion of the surface thereof adapted to form the outer surface of the mandrel, wings pivoted on the core and having the outer surfaces complete the outer surface of the mandrel when in collapsed condition, and awedge adapted to spread the wings "to expand the mandrel and having a portion of the surface thereof adapted to form a outer surface of the mandrel when the wings are expanded.

In testimony whereof, I have hereunto subscribed my name this 9th day of March, 1918.

JESSE s. WENTWORTH.

Witnesses W. THORNTON Boenn'r, A. KAssoN.

corecomprising a shaft, a sleeve 55 for moving the wings to 60 thereof adapted to portion of the 

